MC Jumanji is obsessed with grime — not the stuff under your fingernails, but the British music genre where fast breakbeats are narrated by gritty rhymes. To help popularize grime on this side of the Atlantic, Jumanji cofounded the local music label American Grime. Its monthly Friday-night parties at Kill Your Idol, dubbed "Proper," are a sure opportunity to witness Jumanji rock the mike with his distinctive, brooding pitter-patter as he guides guests through a late-night introduction to the genre. Once you're hooked, continue your education with his 2019 single "Atlantic."